Shuttle



June 11, 1935. E, E FULLER 2,004,721

SHUTTLE FiledMarch 18, 1935 10l 26 40" 3g, I/ ,f

2 (8 zo zal", 56/ (3o /Qz "36 42 14 Uhax' 071.5072, 4Z 6 f M PatentedJune 11, 1935 ySHUTTLE Emil E. Fuller, yWoon'sockei., R. I'.,1vassignorto Shambow Shuttle Company, Woonsocket,v R, I., l acorporation'of Rhode Island Application vMarch 1s,- f193s, 4serial No.661,533

.4 claims; (Criss-2,1471 "i f The present invention relates to shuttlesand more particularly to self-threading shuttles for weftwreplenishing,looms. y Y

'I'he object of the invention is to provide a shut- '.f: tle havinga'tension device with provision for positive and accurate guiding of thethread into the eye after replenishment and for applying positiveAtension to the thread with minimumwear-on the parts.

To this end, the invention comprises the shuttle hereinafter describedandparticularly dened in the claims.

In the accompanying drawing, Fig. 1 isa plan view `of a portion of thepreferred form of shuttle;

;:Fig. 2 is a section on the line 2-2 of Fig. 1; Fig.

3 is a frontelevation of a thread block; Fig. 4 is a section on line 4-4of Fig. 3; and Fig. 5 is an end elevation on a somewhat enlargedscale ofthe block.

'Ihe illustrated embodiment of the invention comprises a shuttle 6having a bobbin recess to receive a bobbin 8 of usual form. The shuttleis provided with a thread block I0 for guiding the thread from thebobbin into the eye l2 of the shuttle. The block is provided with a beakI4. The block also has' a longitudinal unrestricted thread passage I8which is aligned with the axis of the bobbin. At the rear end of theblock there is provided an overhanging hook 20 to direct the thread intoa guide slot 22 which leads into the thread passage.

A tension devicecomprising a pair of spring pressed metal pads 24 islocated in the thread passage. The pads 24, as shown in Fig.v 2, are ofgeneral L-shape, each having a longitudinally disposed portion 26immediately below the thread passage and an upstanding vertical portion28 at the front thereof. The faces of the pads are vertically disposed,the pads being mounted on a pin 3|! extendedy across and immediatelybelow the'thread passage. The pin 30 is arranged at the rear end of thelongitudinal portionsof the pads. At the upper end of the upstandingportions, each pad is formed with a projection 32 which is received in ahardened metal cylindrical bushing 34 pressed in the body of the block,the purpose of the bushing being to resist wear on the blockupon-continual movement of the pads. As shown in Fig. 4, the top andbottom edges of the longitudinal portions 26 of the pads are beveled asare also the edges of the upstanding portions 28 in order to permit thethread to enter and leave the tension device without chaflng. As shownin Fig. 5, the upper ends of the upstanding portions 28 are flared toprovide a V-shaped throat into which the threadl is guided:- immediatelyafter replenishment. 1

'Ihe pads are pressed ,toward each other-byA small coil'springs/SS :and38. Thespring 36f'on= the front side is received in asmall bore 'of theblock and the spring 38 onthe rear side-f.is`re-`vr ceived in anopposing bore:v The bore iin-whichy the spring 36v is received does notextendthroughl` the block and thespring is therefore inserted` from thethread'passage.A f Thebore: into: which the spring 38 is receivedextends through the.A rear.A

' side wall of thev block. .A featurefof the invention consists of meanswhereby the tension onthepadsmay beadjustedf In'order to avoid the'usezof adjusting ;screws,which would,` have toy be placed. on the rearwall of the shuttle with consequent danger of damage to the reed, theinvention contemplates an 'arrangement permitting removal and exchangeof the spring 38. The spring 38 is held in place by a thin sheet metalretaining member 39 having a side plate 40 bearing against f the spring.The member also has a bottom plate 42 provided with an elongated opening44. The positioning stud 46 of the block is undercut to receive thebottom plate 42. The springretainingI member is further held in positionby a hook-like projection 48 on the front end which is received in aslot in the rear side wall of the block. Normally the spring retaining`member is held by engagement with the inside wall of the shuttle in theposition shown in Fig. 5. When it is desired .to change the springtension; the block is removed from the shuttle and the retaining memberis swung to the position indicated in dot-anddash lines in Fig. 4 to oneside. The bottom plate may then be disengaged from the undercut stud 46and removed from the block, permitting insertion of a spring ofdiiferent strength in place of the spring 38. It is unnecessary tochange both springs since sui'licient variation in tension may beobtained by changing the rear spring only.

In operation, the threadunwinding from the bobbin on the rst pick afterreplenishment enters the thread passage through the guide slot 22 andafter passing under the beak I4 it enters between the flaring verticalportions 28 of the tension pads;

On the second pick, the thread passes down into the eye of the shuttle.ridesv over a pin 56 disposed across the thread passage and also overthe pin 3D which supports the tension pads. 'In passing between the pin56 and the eye of the shuttle, the thread is engaged by the opposed padsand is heldunder alight but positive tension. Owing to the beveledconstruc- Thereafter, the thread.

`tion of the pads, the thread enters and leaves the shuttle is suddenlystopped by entering a box at. the end of the pick, particularly if thethread isv of silk or rayon. With the positive control immediatelyadjacent to the eye, as alforded by the present invention, there is nopossiibiiityA for such action to occur. Furthermore, it will be seen.kthat the L-shaped construction of the pads a'ord's positive guiding ofthe thread. into the longitud` nal spring-pressed portion. Theupstanlding parts of the pads extend well above the center' ofthe'threat am so: that.. the thread: lapositivelyl engaged thereby omthemxst, pick. attenreplenish.- ment., 4tlm thrfsermxilxV piick thethread is easily guided between, plates into: the eye, of the shuttle.25

Thef Lesbapefotthe tension further. provides; for. ofi wenn. sinne the;threadeontinually chamstsfpnsitmrn betwemzthapads as the shuttlnf iapiblmd first: inerme and them the othlr 3QM lllwwlng: thuafdescribed'the invention, what. is

clmimeliiisr.: Y vI v Y l t A shuttle havingL an; eye;,a= block.havingay longitudinal: tlmead: message;A av ten-sionx device in;-y

cllldinglongimdmaliy disposed pads arranged adx 'lactuiltt the eye.:and; below` the threadpassageand from which the thread leads directly tothe eye, each pad having an upstanding thread guiding portion at thefront end of the thread passage.

2. A shuttle havingvan eye, a block having a longitudinal threadpassage, a tension device comprising a pair of pads having opposedvertical faces, each pad being L-shaped and having a 1ongitudinallydisposed portion belowthe thread passage and; immediately adjacent tothefey'e and `from which the thread leads directly-to the eye, each padalso having an upstanding portion at the front end of the thread passageto engage the thread during threading of the shuttle, and means foryieldingly pressing the pads together. v

3. A shuttlehaving an eye, a block having a longitudinal thread passage,a tension device comprising a pair of'opposed L-shaped pads, each pad'having a longitudinally disposedportion from which the thread leadsdirectly to the eye and an upstandin-g vertical portion with a flaredupper end at the-front end of. the longitudinally disposed portion; apinfor. supporting .tllezremzA part-ottima longitudinal portions ofthe:padslgyznadx means for pressing thepadsi er. .A 4. A shuttle having-amma block; having ai bottom stud-a tension, devine comprising opposedfpads, a coi-1A spring liar yieldingly 'pressing the together, anda-netaiming memhenfoxrr tive springl including a side plate and a bottomp1ate,'the;

bottom yplate` having, an. elongatedi openingi tof-lit i over; the stud,the stud'being tofl'oekf retaining member when the side plate islargesse@-v` against thewallio the'block.. i f

' EMILE?. f

